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Short Poster Lecture

Nanostructure and mechanical properties of hair due to colour treatment

Monday (19.03.2018)
20:30 - 20:35
Part of:

Colouring of hair by biological substances, in particular plant dyes such as Henna or Indigo, are widely used procedures to achieve a variation in the appearance and a specific look of many people. Colouring, however, is a complicated process, where the substances have to infiltrate a material with different structures such as the cuticle, the cortex and the medulla. As hair is also a hierarchical material, it has additional structural features at different length scales, from atomic to the nanoscale. This is due to by keratin coiled-coils forming intermediate filaments with a diameter of 7 to 10 nm. At this size level, we investigated the effect of colouring dyes on the nanostructure by small-angle and wide-angle X-ray scattering techniques. The structural data are correlated to mechanical data from tension tests, and a positive or negative effect on the tensile strength is discussed.

Alexander Müllner
University of Vienna
Additional Authors:
  • Alexander Müllner
    University of Vienna
  • Dr. Doris Brandhuber
    LIM Cosmetics GmbH